Acne and Related Disorders — MCQs

Physical examination on a 65-year-old man with mild congestive heart failure reveals varicose veins, ankle edema, and inflammation of much of the skin near the ankles of both legs. The affected skin exhibits edema, erythema, mild scaling, and brown discoloration. The edges of skin involvement are poorly defined. On one ankle, a one centimeter diameter ulcerated area is seen within the erythematous area. The patient says that his leg lesions look much worse than they feel. Which of the following is the most likely diagnosis?

Q24Medium

A farmer presents with a lesion on the leg. Which of the following is the most likely diagnosis?

Q25Medium

A 58-year-old man complains of an enlarged, pitted nose, and a facial rash that flushes in response to drinking hot liquids or alcohol. The rash is on both cheeks and is red and flushed in appearance, with some telangiectasias and small papules. Which of the following is the most likely diagnosis?

Q26Easy

The proportion of which of the acids is increased in acne comedones?

Q27Easy

Rhinophyma is characterized by which of the following?

Q28Easy

Rhinophyma is a complication of which of the following?

Q29Easy

Treatment of acne vulgaris may include all except?

Q30Easy

Hidradenitis suppurativa is commonly found in which of the following locations?

Acne and Related Disorders Indian Medical PG Practice Questions and MCQs

Question 21: Rhinophyma is a type of?

A. Acne vulgaris
B. Acne rosacea (Correct Answer)
C. Fungal infection
D. Hematoma

Explanation: **Explanation:** **Rhinophyma** is a clinical subtype of **Acne Rosacea** (specifically Stage III or Phymatous Rosacea). It is characterized by the hypertrophy of sebaceous glands and fibrosis of the connective tissue, leading to a bulbous, irregular, and "cobblestone" enlargement of the nose. It predominantly affects elderly males. **Why the other options are incorrect:** * **Acne Vulgaris:** While both involve sebaceous glands, acne vulgaris is characterized by comedones (blackheads/whiteheads), which are strictly absent in rosacea. Rosacea is primarily a vascular and inflammatory disorder. * **Fungal Infection:** Rhinophyma is a structural hypertrophic change, not an infectious process. While some theories link rosacea to *Demodex folliculorum* (a mite), it is not a fungal etiology. * **Hematoma:** A hematoma is a localized collection of blood outside blood vessels. While the rhinophymatous nose may appear erythematous (red) due to telangiectasia, the pathology is glandular hyperplasia, not hemorrhage. **High-Yield Clinical Pearls for NEET-PG:** * **Phymatous Rosacea:** Can affect other areas: **Metophyma** (forehead), **Otophyma** (ears), **Blepharophyma** (eyelids), and **Gnathophyma** (chin). * **Demographics:** Rosacea is more common in females, but **Rhinophyma** is significantly more common in **males**. * **Triggers:** Alcohol, spicy foods, and sunlight can exacerbate rosacea (flushing), but alcohol is *not* the direct cause of rhinophyma (contrary to the "rum nose" myth). * **Treatment:** Early rosacea is treated with topical Metronidazole or Brimonidine; advanced Rhinophyma usually requires surgical debulking or CO2 laser resurfacing.

Question 22: A 35-year-old woman presents with a history of erythematous papulopustular lesions on the face, with diffuse redness on her cheeks. What is the most likely diagnosis?

A. Acne vulgaris
B. Rosacea (Correct Answer)
C. Atopic dermatitis
D. Seborrheic dermatitis

Explanation: **Explanation:** The clinical presentation of erythematous papulopustular lesions associated with diffuse facial redness (erythema) in a 35-year-old woman is classic for **Rosacea**. **1. Why Rosacea is Correct:** Rosacea is a chronic inflammatory dermatosis primarily affecting the "flush areas" of the face (cheeks, nose, chin, and forehead). The key differentiating feature from acne is the **absence of comedones** and the presence of **persistent erythema and telangiectasia**. It typically affects middle-aged adults (30–50 years), particularly women. The papulopustular subtype (Subtype 2) mimics acne but occurs on a background of chronic redness. **2. Why Other Options are Incorrect:** * **Acne Vulgaris:** While it presents with papules and pustules, the hallmark lesion is the **comedone** (blackhead/whitehead). It typically begins in puberty and lacks the diffuse, persistent background erythema seen in rosacea. * **Atopic Dermatitis:** This presents with intense pruritus, xerosis (dryness), and eczematous plaques, usually on flexural surfaces. Facial involvement is more common in infants than in 35-year-old adults. * **Seborrheic Dermatitis:** Characterized by erythematous plaques with **greasy, yellowish scales** in seborrheic areas (nasolabial folds, eyebrows, scalp). It does not typically present with pustules. **High-Yield Clinical Pearls for NEET-PG:** * **Triggers:** Spicy food, alcohol, sunlight, and hot beverages (vasodilation). * **Ocular Rosacea:** Up to 50% of patients have eye involvement (blepharitis, conjunctivitis). * **Rhinophyma:** Hypertrophy of sebaceous glands leading to a bulbous nose (more common in men). * **Treatment:** Topical **Metronidazole** is the drug of choice for mild cases; oral Doxycycline is used for systemic therapy. Avoid topical steroids as they can worsen the condition (Steroid-induced Rosacea).

Question 23: Physical examination on a 65-year-old man with mild congestive heart failure reveals varicose veins, ankle edema, and inflammation of much of the skin near the ankles of both legs. The affected skin exhibits edema, erythema, mild scaling, and brown discoloration. The edges of skin involvement are poorly defined. On one ankle, a one centimeter diameter ulcerated area is seen within the erythematous area. The patient says that his leg lesions look much worse than they feel. Which of the following is the most likely diagnosis?

A. Atopic dermatitis
B. Lichen simplex chronicus
C. Stasis dermatitis (Correct Answer)
D. Seborrheic dermatitis

Explanation: **Explanation:** **Stasis Dermatitis** is the correct diagnosis based on the patient’s age, underlying medical history, and clinical presentation. The fundamental pathology is **chronic venous insufficiency**. In this patient, congestive heart failure and varicose veins lead to venous hypertension. This causes fluid and red blood cells to leak into the dermis. The breakdown of hemoglobin results in **hemosiderin deposition**, which explains the characteristic **brown discoloration** (brawny edema). The clinical triad of edema, erythema/scaling, and ulceration near the medial malleolus is classic for this condition. **Why the other options are incorrect:** * **Atopic Dermatitis:** Typically presents in childhood with intense pruritus and involvement of flexural surfaces (popliteal/antecubital fossae). It does not cause brawny discoloration or venous ulcers. * **Lichen Simplex Chronicus (LSC):** This is a result of chronic scratching/rubbing. It presents as localized, well-defined, leathery (lichenified) plaques. While it can occur on the lower legs, it lacks the systemic signs of venous congestion. * **Seborrheic Dermatitis:** Characterized by greasy, yellowish scales in "seborrheic" areas (scalp, eyebrows, nasolabial folds). It does not affect the lower extremities or cause ulceration. **NEET-PG High-Yield Pearls:** * **Location:** Most common on the medial malleolus. * **Lipodermatosclerosis:** A chronic stage where the skin becomes "woody" and indurated, giving the leg an **"inverted champagne bottle"** appearance. * **Management:** The primary treatment is addressing the underlying venous hypertension via **compression stockings** and leg elevation. * **Complication:** Stasis dermatitis is a major risk factor for developing **allergic contact dermatitis** due to the frequent use of topical medications on a compromised skin barrier.

Question 24: A farmer presents with a lesion on the leg. Which of the following is the most likely diagnosis?

A. Verruca vulgaris
B. Tuberculosis verrucosa cutis (Correct Answer)
C. Mycetoma
D. Lichen planus hypertrophicus

Explanation: ***Tuberculosis verrucosa cutis*** - Occurs through **inoculation** in individuals with high immunity to TB, commonly in **farmers** and **laborers** exposed to contaminated soil. - Presents as a **verrucous plaque** on extremities, typically the **legs or hands**, with characteristic **warty appearance**. *Verruca vulgaris* - Caused by **human papillomavirus (HPV)** and lacks specific **occupational association** with farming activities. - Usually appears as **discrete papules** with **black dots** (thrombosed capillaries), not large verrucous plaques. *Mycetoma* - Characterized by the **triad** of **tumefaction**, **sinuses**, and **grains** discharged from sinus tracts. - Involves **deeper subcutaneous tissues** and bone, presenting with significant **swelling** and **deformity**. *Lichen planus hypertrophicus* - Shows **violaceous polygonal papules** that are **pruritic** and typically affect **flexural surfaces**. - Lacks **occupational predisposition** and has different **morphological characteristics** compared to verrucous lesions.

Question 25: A 58-year-old man complains of an enlarged, pitted nose, and a facial rash that flushes in response to drinking hot liquids or alcohol. The rash is on both cheeks and is red and flushed in appearance, with some telangiectasias and small papules. Which of the following is the most likely diagnosis?

A. acne vulgaris
B. pemphigus
C. rosacea (Correct Answer)
D. psoriasis

Explanation: **Explanation:** The clinical presentation of facial flushing triggered by **hot liquids and alcohol**, combined with **telangiectasias, papules**, and an **enlarged, pitted nose (rhinophyma)**, is classic for **Rosacea**. Rosacea is a chronic inflammatory dermatosis primarily affecting the "flush areas" of the face. The patient exhibits features of two subtypes: 1. **Erythematotelangiectatic Rosacea:** Characterized by flushing and persistent central facial erythema with telangiectasias. 2. **Phymatous Rosacea:** Characterized by skin thickening and irregular surface nodularities, most commonly affecting the nose (rhinophyma). This subtype is predominantly seen in men. **Why other options are incorrect:** * **Acne Vulgaris:** While it presents with papules, it is characterized by the presence of **comedones** (absent here) and typically affects a younger age group. It does not cause flushing or rhinophyma. * **Pemphigus:** An autoimmune blistering disorder. It presents with flaccid bullae and erosions, not flushing or phymatous changes. * **Psoriasis:** Presents as well-demarcated erythematous plaques with silvery-white scales, typically on extensor surfaces. Facial involvement is less common and does not involve flushing triggers. **NEET-PG High-Yield Pearls:** * **Triggers:** Sunlight, spicy food, alcohol, and emotional stress. * **Ocular Rosacea:** Up to 50% of patients have eye involvement (blepharitis, conjunctivitis). * **Management:** * General: Sun protection and trigger avoidance. * Topical: **Metronidazole** (drug of choice), Ivermectin, or Azelaic acid. * Systemic: Oral Doxycycline (sub-antimicrobial doses). * Rhinophyma: Treated with CO2 laser or surgical debulking.

Question 26: The proportion of which of the acids is increased in acne comedones?

A. Linolenic acid
B. Palmitic acid (Correct Answer)
C. Acetic acid
D. Linoleic acid

Explanation: In acne pathogenesis, alterations in the lipid composition of sebum play a critical role in the formation of comedones (follicular plugging). **Why Palmitic Acid is Correct:** The development of acne is associated with a specific shift in the fatty acid profile of sebum. Research indicates that in patients with acne, there is an **increase** in the levels of **Palmitic acid** (a saturated fatty acid) and a decrease in linoleic acid. High levels of palmitic acid contribute to the proinflammatory environment and stimulate the expression of inflammatory cytokines (like IL-1α) in keratinocytes, which promotes follicular hyperkeratosis and the formation of the microcomedo. **Analysis of Incorrect Options:** * **Linoleic acid (D):** This is the most important distractor. In acne patients, levels of linoleic acid are significantly **decreased** (hyposeborrheic state). Low linoleic acid leads to impaired skin barrier function and follicular hyperkeratosis. * **Linolenic acid (A):** While an essential fatty acid, it does not show the same diagnostic increase in comedones as palmitic acid. * **Acetic acid (C):** This is a short-chain fatty acid not primarily involved in the lipid pathophysiology of sebum or comedogenesis. **High-Yield Clinical Pearls for NEET-PG:** * **The "Linoleic Acid Theory":** Low levels of linoleic acid lead to "dilutional hypolinoleate," which triggers the comedogenic process. * **Sebum Composition:** Sebum is composed of Triglycerides (approx. 40%), Wax esters (25%), Squalene (12%), and Cholesterol. * **Role of *C. acnes*:** This bacterium produces **lipases** that break down triglycerides into **Free Fatty Acids (FFAs)**, which are highly irritating to the follicular wall and promote inflammation.

Question 27: Rhinophyma is characterized by which of the following?

A. Septal deviation of the nose
B. Sweat gland hypertrophy
C. Mucous gland hypertrophy
D. Sebaceous gland hypertrophy (Correct Answer)

Explanation: **Explanation:** **Rhinophyma** is a severe, late-stage manifestation of **Phymatous Rosacea**. It is characterized by a bulbous, irregular enlargement of the nose, primarily due to the **hypertrophy and hyperplasia of sebaceous glands**, along with associated fibrosis and connective tissue proliferation. 1. **Why Option D is correct:** In the phymatous stage of rosacea, chronic inflammation leads to the overgrowth of the pilosebaceous units. This results in thickened skin, enlarged follicular orifices, and a "potato-like" appearance of the nose. Histologically, there is a marked increase in the size and number of sebaceous glands. 2. **Why other options are incorrect:** * **Option A:** Septal deviation is a structural/anatomical deformity of the nasal cartilage and bone, unrelated to the cutaneous pathology of rosacea. * **Option B & C:** While there is soft tissue hypertrophy, it specifically involves the sebaceous glands and dermal collagen, not the sweat (eccrine/apocrine) or mucous glands. **High-Yield Clinical Pearls for NEET-PG:** * **Demographics:** Unlike classic rosacea (more common in females), Rhinophyma is significantly more common in **males** (ratio ~20:1). * **Common Sites:** While the nose is most common, other "phyma" types include **Gnathophyma** (chin), **Metophyma** (forehead), and **Otophyma** (ears). * **Clinical Sign:** The "Squeezing Sign"—pressure on the rhinophyma may express a foul-smelling, pasty sebum (seborrhea). * **Treatment:** Medical therapy (Isotretinoin) is effective in early stages, but established Rhinophyma usually requires **surgical intervention** (CO2 laser resurfacing or electrosurgery) to debulk the tissue.

Question 28: Rhinophyma is a complication of which of the following?

A. Glandular form of acne rosacea (Correct Answer)
B. Form of acne vulgaris
C. Affects the scalp
D. A form of dermatofibroma

Explanation: ### Explanation **Rhinophyma** is the end-stage clinical manifestation of the **Phymatous subtype (Subtype 3)** of **Acne Rosacea**. It is characterized by the hypertrophy of sebaceous glands and fibrosis of the connective tissue, leading to a bulbous, irregular, and "cobblestone" enlargement of the nose. #### Why the Correct Answer is Right: * **Glandular form of acne rosacea:** Rosacea is a chronic inflammatory condition. In its phymatous stage, there is significant **sebaceous gland hyperplasia** (glandular form). While it most commonly affects the nose (Rhinophyma), it can also affect the chin (Gnathophyma), forehead (Metophyma), and ears (Otophyma). It is predominantly seen in elderly males. #### Why Other Options are Wrong: * **B. Form of acne vulgaris:** Unlike rosacea, acne vulgaris is characterized by comedones (blackheads/whiteheads) and typically affects a younger age group. Rhinophyma is never a complication of common acne. * **C. Affects the scalp:** Rhinophyma specifically involves the nose. While some dermatological conditions affect the scalp, rosacea is primarily a facial centro-facial disease. * **D. A form of dermatofibroma:** Dermatofibroma is a benign fibrous nodule (usually on the limbs) caused by proliferation of fibroblasts; it is unrelated to the sebaceous gland pathology of rosacea. #### High-Yield Clinical Pearls for NEET-PG: * **Demographics:** Rosacea is more common in females, but the **Phymatous variant (Rhinophyma) is significantly more common in males.** * **Triggers:** Alcohol, spicy foods, and sunlight can exacerbate rosacea (flushing), but alcohol is **not** the direct cause of Rhinophyma (contrary to the "rum blossom" myth). * **Ocular Rosacea:** Up to 50% of patients have eye involvement (blepharitis, conjunctivitis). * **Treatment:** Early rosacea is treated with topical Metronidazole or Azelaic acid. Rhinophyma requires **surgical correction** (CO2 laser or electrosurgery) as medical therapy cannot reverse the fibrosis.

Question 29: Treatment of acne vulgaris may include all except?

A. Cryotherapy
B. Oestrogens
C. UV light
D. Androgens (Correct Answer)

Explanation: **Explanation:** The pathogenesis of **Acne Vulgaris** is primarily driven by four factors: follicular hyperkeratinization, *Cutibacterium acnes* colonization, inflammation, and **excess sebum production**. Sebum production is directly stimulated by **Androgens** (specifically Dihydrotestosterone acting on sebaceous glands). Therefore, administering androgens would exacerbate acne rather than treat it, making it the correct "except" choice. **Analysis of Options:** * **Androgens (Correct Answer):** These increase the size and activity of sebaceous glands. Conditions with high androgen levels (e.g., PCOS, adrenal tumors) are classic causes of refractory acne. * **Oestrogens:** These are used in female patients (often via Oral Contraceptive Pills) to suppress ovarian androgen production and increase Sex Hormone Binding Globulin (SHBG), which lowers free testosterone, thereby improving acne. * **UV Light:** Phototherapy (Blue/Red light) has an antibacterial effect on *C. acnes* and anti-inflammatory properties. While not a first-line treatment, it is a recognized adjuvant modality. * **Cryotherapy:** Slush cryotherapy (using CO2 or Liquid Nitrogen) is an older but recognized physical therapy used to induce superficial peeling and reduce inflammation in nodulocystic acne. **NEET-PG High-Yield Pearls:** * **First-line for mild acne:** Topical retinoids + Benzoyl Peroxide. * **Drug of choice for severe/nodulocystic acne:** Oral Isotretinoin (Side effect: Teratogenicity—requires contraception). * **Hormonal therapy:** Indicated in females with hyperandrogenism (PCOS) or cyclical flares; includes Spironolactone (anti-androgen) and OCPs. * **Dietary link:** High glycemic index foods and dairy are associated with acne flares.

Question 30: Hidradenitis suppurativa is commonly found in which of the following locations?

A. Axilla
B. Circumanal region
C. Scalp
D. All of the above (Correct Answer)

Explanation: **Explanation:** **Hidradenitis Suppurativa (HS)**, also known as **Acne Inversa**, is a chronic inflammatory skin condition primarily affecting the **apocrine gland-bearing areas** of the body. The pathogenesis involves follicular occlusion of the pilosebaceous unit, leading to abscess formation, sinus tracts, and scarring. * **Axilla:** This is the most common site of involvement in both males and females. * **Circumanal/Anogenital region:** This is a frequent site, particularly in males, often presenting with painful nodules and foul-smelling discharge. * **Scalp:** While less common than the axilla or groin, HS can involve the scalp (often associated with the **Follicular Occlusion Tetrad**). Since all three locations are rich in apocrine glands or prone to follicular occlusion, **Option D (All of the above)** is the correct answer. **Clinical Pearls for NEET-PG:** 1. **Follicular Occlusion Tetrad:** Includes (1) Hidradenitis Suppurativa, (2) Acne Conglobata, (3) Dissecting Cellulitis of the scalp, and (4) Pilonidal Sinus. 2. **Hurley Staging System:** Used to grade severity: * *Stage I:* Abscess formation without sinus tracts or scarring. * *Stage II:* Recurrent abscesses with sinus tracts and scarring. * *Stage III:* Diffuse involvement with interconnected tracts and abscesses across an entire area. 3. **Risk Factors:** Strongly associated with **smoking** and **obesity**. 4. **Treatment:** First-line medical management includes topical/oral antibiotics (Clindamycin + Rifampicin). For severe cases, Adalimumab (TNF-α inhibitor) or wide surgical excision is required.

Practice by Chapter

Acne Vulgaris: Pathophysiology

Practice Questions

Acne Vulgaris: Clinical Types

Practice Questions

Acne Vulgaris: Management

Practice Questions

Acne in Special Populations

Practice Questions

Rosacea

Practice Questions

Perioral Dermatitis

Practice Questions

Hidradenitis Suppurativa

Practice Questions

Acne Keloidalis Nuchae

Practice Questions

Acne Scarring and Its Management

Practice Questions

Psychological Aspects of Acne

Practice Questions

Diet and Acne

Practice Questions

Newer Therapies in Acne Management

Practice Questions

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